Stop vis.js physics after nodes load but allow drag-able nodes

I am trying to draw a vis.js network diagram and have vis load and position the nodes. I then want the physics to be disabled so the nodes can be moved by the user. I have tried this but it is not working.

Has anyone done this? if so can you provide an example or advice on best way to accomplish this. I have also read the explanation located here, but not being too familiar with java I can't figure the steps out.